Device in a warp tying machine



June 23, 1964 P. GRNERT DEvcE 1N A WARP TYING MACHINE Filed May 31, 1962 a, I Ml,

INVENTOR Pa u] 6- rne 16 United States Patent Oiitice 3,138,396 Patented .June 23, 1 964 3,133,396 DEVICE IN A WAI-KP TYING MACHINE Paul Grnert, Friedberg, near Augsburg, Bavaria, Germany, assiguor to Knotex Maschinenbau Gesellschaft mit beschrnkter Haftung, Augsburg, Germany, a corporation of Germany Filed May 31, 1962, Ser. No. 199,037 Claims priority, application Germany June 14, 1961 3 Claims. (Cl. 289-12) The inventionrelates to a device for an optional singleor double-tying of two warp threads in a warp tying machine. Such devices have been developed in order to enable the operator, depending on the kind of the thread, to tie threads together with single or double knots, the latter being desirable when a particular elasticity and smoothness of the thread requires it for the purpose of obtaining a fast tie.

It is the purpose of this invention to render this device as simple as possible, preventing the machine from getting unnecessarily expensive. Further, the shifting mechanism has been kept as simple as possible to facilitate the process of shifting. Another feature is to avoid running the machine at double speed when tying a double knot as compared with tying a single knot, i.e. to run the machine at a higher speed only to form a double sling through the knotter, and to pull the two thread ends through the slings at the lower speed corresponding to single knotting, which feature is much in favour of operating reliability in particular when the machine output is high, the more as the number of knots to be performed per unit time remains the same.

The invention solves this problem by providing a knotting mandrel driven over a planetary gearing, the planet pinion being pivoted to a Geneva Wheel or other star Wheel which revolves about the same axis as the sun Wheel and which engages one or more indexing pins pertaining to an indexing mechanism acting as a singlerevolution shaft to be coupled to the main drive at will and, during half a revolution, rotating the Geneva wheel in such a manner that double speed is imparted tothe knotting mandrel.

Hence, only few components are necessary for a device according to this invention, and these components may be arranged in narrow quarters. All other components of the knotter remain unchanged. They perform their function unchanged as in single knotting. This holds true, in particular, for the second half revolution of the indexing element acting as a single-revolution shaft, and during this second half revolution the two thread ends are pulled through the two previously formed thread slings, which operation is performed at the samevspeed as the singleknotting operation. In order to make sure that the planet pinion remains at a standstill, the invention provides that the revolving indexing element is cam-shaped to control the movement of a lock via another cam, this lock acting on the Geneva wheel whilst it stands still.

Further, the invention provides a recess on the revolving indexing element engaging a locking pawl arranged on a clutch shift lever which is pivoted to the machine frame. By this, it is made sure that engagement and disengagement of the clutch, which may be effected by manual action if desired, is only possible with the knotter in its neutral position.

An application is represented in the drawing, in which:

FIG. 1 is a side elevation,

FIG. 2 is a top View of FIG. l,

FIG. 3 is a view across FIG. l, along the plane I-I.

The main driving shaft 1 carries a planetary gearing comprising an internal gear rim or sun gear 2 meshing with a pinion 3 engaging a gear 4 secured to a hollow shaft 5 whose axis coincides with shaft 1 and which revolves easily independent of shaft 1. This hollow shaft 5 carries a gear 6 revolving the knotting mandrel 7 about its longitudinal axis via a helical gearing. As planet pinion, the pinion 3 is on the Geneva wheel 8 which is capable of revolving freely about an axis coinciding with the axis of shaft 1 in which connection a needle bearing 9 is spaced between this Geneva wheel and the hollow shaft 5. The indexing pins 10 of an indexing element 11 engage the grooves 8a of the Geneva wheel, the indexing element 11 thereby acting as single-revolution shaft which means that it performs one revolution per knotting operation after it has been connected with the shaft 13 revolving with the main driving shaft 1 by means of the clutch 12. The shifting sleeve 12 of the clutch 12 is put in motion by a fork-shaped arm 14 which is on a lever pivoted at 15 to the machine frame, the arm 14 includes a locking nose 14 cooperating with a recess 16 in the cam 11. This cooperation is such that the clutch 12 may be disengaged only when the locking pawl 14 can drop into the recess 16. The lever which carries the locking pawl 14 also carries a pin 1S to be grasped in an operators hand. A handle sleeve 19 having a tapered end 198L is reciprocally received on pin 18. A compression spring 20 draws this handle towards the lever. It is made to engage recesses 21 in a machine bracket 22 with its tapered end. To engage or disenage the clutch, the sleeve handle 19 rst needs to be withdrawn along the pin 18 in a direction away from the bracket 22 out of recess 21, and only then it will be possible to displace the lever 14.

The circumference of the cam 11 of the single-revolution indexing element 11 acts on the roller 23 on a swivel arm 25 pivoted at 24. The arm 25 has on its outer end a locking block 26 which drops into a recess 27 on the Geneva wheel 8 to lock it in position. This lock becomes eifective when the indexing pins 10 do not act on the Geneva wheel so that, with the clutch 12 disengaged, i.e. when a single knot needs to be tied, the pinion 3 is retained against rotation. When, on the other hand, a double knot needs to be tied, the clutch is engaged. The indexing pins 10 act on the Geneva wheel in such a manner that the pinion 3 imparts twice the original speed to the double gear block 4, 5, 6, enabling the knotter to perform two revolutions instead of one during the effective half revolution of the single-revolution shaft. During the remaining half revolution of the single-revolution shaft 11, the Geneva wheel remains at a standstill, to permit the two thread ends to be put through the double sling at the same speed as with single knotting.

I declare that what I claim is:

l. Operating mechanism for a warp tying machine to alternatively tie single or double warp threads comprising a knotting mandrel mounted on an axis of rotation, planetary gearing operatively connected to said knotting mandrel, said planetary gearing comprising a sun gear, a pinion gear meshed with said sun gear and a drive gear meshed with said pinion gear and journaled on an axis of rotation common with that of said sun gear and independently rotatable with respect to said sun gear, an indexing wheel journaled on the axis of rotation of said sun gear and having said pinion gear journaled thereon, said indexing wheel including spaced, radial indexing grooves opening into the outer periphery thereof, indexing means mounted on a one-revolution shaft parallel to the axis of rotation of said sun gear, said indexing means including an indexing element journaled on said one-revolution shaft and having portions engageable in said indexing wheel grooves, said indexing means including a clutch engageable between said indexing element and said one-revolution shaft, said indexing means including a displaceable abutment element engageable with said indexing element for preventing rotation thereof when said clutch is disengaged to permit normal rotation of said knotting mandrel for forming a single warp thread, said indexing means including a second displaceable abutment optionally engageable with said indexing wheel for momentarily restraining rotation thereof and permitting said knotting mandrel to be rotated at twice the normal speed to form a two-warp thread tie.

2. The stmcture of claim 1 in which said indexing element comprises a cam having a peripheral control edge, said second displaceable abutment including a cam follower engaged on said peripheral control edge, said control edge determining periodic engagement of said second displaceable abutment with said wheel.

3. The structure of claim 1 in which said indexing element includes a peripheral recess, said first mentioned abutment comprising a lever connected to said clutch and displaceable thereby for preventing rotation of said in- 5 dexing element when said clutch is disengaged.

References Cited in the file of this patent UNITED STATES PATENTS 1,099,128 Poege June 2, 1914 2,608,426 Connor Aug. 26, 1952 2,678,229 Shortland May 11, 1954 

1. OPERATING MECHANISM FOR A WARP TYING MACHINE TO ALTERNATIVELY TIE SINGLE OR DOUBLE WARP THREADS COMPRISING A KNOTTING MANDREL MOUNTED ON AN AXIS OF ROTATION, PLANETARY GEARING OPERATIVELY CONNECTED TO SAID KNOTTING MANDREL, SAID PLANETARY GEARING COMPRISING A SUN GEAR, A PINION GEAR MESHED WITH SAID SUN GEAR AND A DRIVE GEAR MESHED WITH SAID PINION GEAR AND JOURNALED ON AN AXIS OF ROTATION COMMON WITH THAT OF SAID SUN GEAR AND INDEPENDENTLY ROTATABLE WITH RESPECT TO SAID SUN GEAR, AN INDEXING WHEEL JOURNALED ON THE AXIS OF ROTATION OF SAID SUN GEAR AND HAVING SAID PINION GEAR JOURNALED THEREON, SAID INDEXING WHEEL INCLUDING SPACED, RADIAL INDEXING GROOVES OPENING INTO THE OUTER PERIPHERY THEREOF, INDEXING MEANS MOUNTED ON A ONE-REVOLUTION SHAFT PARALLEL TO THE AXIS OF ROTATION OF SAID SUN GEAR, SAID INDEXING MEANS INCLUDING AN INDEXING ELEMENT JOURNALED ON SAID ONE-REVOLUTION SHAFT AND HAVING PORTIONS ENGAGEABLE IN SAID INDEXING WHEEL GROOVES, SAID INDEXING MEANS INCLUDING A CLUTCH ENGAGEABLE BETWEEN SAID INDEXING ELEMENT AND SAID ONE-REVOLUTION SHAFT, SAID INDEXING MEANS INCLUDING A DISPLACEABLE ABUTMENT ELEMENT ENGAGEABLE WITH SAID INDEXING ELEMENT FOR PREVENTING ROTATION THEREOF WHEN SAID CLUTCH IS DISENGAGED TO PERMIT NORMAL ROTATION OF SAID KNOTTING MANDREL FOR FORMING A SINGLE WARP THREAD, SAID INDEXING MEANS INCLUDING A SECOND DISPLACEABLE ABUTMENT OPTIONALLY ENGAGEABLE WITH SAID INDEXING WHEEL FOR MOMENTARILY RESTRAINING ROTATION THEREOF AND PERMITTING SAID KNOTTING MANDREL TO BE ROTATED AT TWICE THE NORMAL SPEED TO FORM A TWO-WARP THREAD TIE. 